Question

the cost of old boiler is £775 per year,the new one is £1850 ,the cost of using a new boiler will be 1/5 less than the cost of using the opd boiler. how many years will it take for the savings feom cost of using nthe new boiler to total £1850​

Answer 1

I think its 12.3 years

Explanation:

a fifth of 775 is 155 and 155 x 12.3 = 1850